Total duration of the science exposure, i.e., the PhotonCollectingTime plus overhead and BackgroundResetsTime (seconds). NOTE: This keyword is present for backward compatibility with ground system software. Where possible, use the FITS Standard keyword TELAPSE for this value.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | seconds |
| example | 3999.632 |
| default value | |
| special processing | VALUE_REQUIRED |
| source | Observatory Status File (OSF) |
| software source | METRICS:completedExposure.exposureTime |
| calculation | EFFEXPTM + TFRAME*(NRSTSTRT+(NRESETS*(NINTS-1)+(DRPFRMS1*NINTS)) + BackgroundResetsTime, where BackgroundResetsTime = NumResetRows * NINTS * 0.00001 seconds, where NumResetRows comes from the PRD SubarrayFrameTime table |
| DB destination | ['ScienceCommon.duration'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Exposure |